Plunger for time-stamps.



Patented July I6, 190|Y P. s. Gmoun.

PLUNGER FOR TIME STAWIPS.

, (Application led Apr. 20, 1900.)

(No Model.)

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15 stamps for the operator to strike the plunger 1 turen drains v Amar trice.

PETER G. GIROUD, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE INTER- NATIONAL TIME RECORDING COMPANY, OF NEW JERSEY.

PLUNGER FOR TINIEHSTAMPS.

SPECIFICATION forming part of Letters Patent No. 678,778, dated TU-1y 16, 1901- Application filed April Z0, 1900. Serial No. 13,594. (No model.)

To @ZZ whom it may concern:

Be it known that I, PETER G. GIRoUD, a citizen of the United States, and a resident of Newark, in the county of Essex and State of 5 New Jersey,I have invented a new and useful Plunger for Time-Stamps, of which the following` is a specification.

My invention relates to a plunger for timestamps, with the object in view of providing 1o a plunger which may be utilized with timestamps of varying types at present in common use and which will prevent liability of injury to the type under unusual impulse.

It is quite common in the use of timea sharper blow than is necessary for securing the impression, the purpose being to be sure and get a clear impression, the party not realizing that a blow may loe struck which 2o will injure the type.

My present invention is directed to the structure and mounting of a plunger which will successfully resist such unnecessarily sharp blows from the hand of the operator 2 5 and spare the damaging of the type, even though the blow be unusually severe.

A practical embodiment of myinvention is represented in the accompanying drawings, in which- Figure l is a front View of the plunger, showing it in position with relation to a group of type-wheels. Fig. 2 is a side view of the same, and Fig. 3 is a partial vertical section from front to rear.

The impression-platen is denoted by A. It is faced with some suitable yielding material asuch, for exarn`ple,ras rubber-and is provided with a socket o on its back, throughwhich a set-screw a2 extends for the purpose 4o of removably securing the platen to the lower end of the plunger.

The plunger-rod is denoted by B. The connection between the socket on the back of the platen A and the plunger-rod B is made by 45 means of a sleeve O, the lower end of which is fitted to enter the socket o on the back of the platen. The plu nger-rod is provided with apin l), extending laterally therefrom through an elongated slot c in the sleeve O and also 5o through an elongated slot d in the front of the hollow head D of the overhanging supportingarm E, which is intended to be secured to the supporting-frame in position to maintain the impression-platen opposite the type-wheels of the stamp. The pin l) is conveniently screwthreaded and provided with a kerf in its head for the purpose of removing it at pleasure. The sleeve O is intended to fit and slide easily within the enlarged bore iu the lower part of the head D, and the plunger-rod B is intended to slide with an easy-sliding iit within the sleeve C, the sliding movement of the vplunger-rod within the sleeve O being limited in extent by means of the pin b eX- tending through the slot c in the sleeve C.

A stiff spring F, inserted within the sleeve C below the plunger-rod B, serves to hold the rod at the limit ot' its upward movement relative to the sleeve O and serves to form a yielding cushion between the said rod and the impression-platen when the said rod is depressed to force the record-receiving strip into contact with the type and printing-ribbon. A nut f, screwed into the lowervend of the sleeve C, serves as a keeper to hold the spring in place when theplaten is removed.

The plunger-rod B intermediate of its ends is fitted to slide vertically within the contracted portion CZ of the bore in the head D, and the said plunger-rod, sleeve, and platen are normally lifted or out of contact with the record-receiving strip, ribbon, and type by means of a coil-spring H, located around the plunger-rod within the upper enlarged bore of the head D, the lower end of the spring bearing against a shoulder d2 within the said head D and its upper end bearing against the lower end of the socket g, depending from the handle G. The upper end b' of the plungerrod is screw-threaded and adapted to screw into the interiorly-screw-threaded socket g. The handle is conveniently provided with a depending cylindrical guard g, which is intended to surround the upper portion of the head D and protect the interior of the said head from dust and foreign matter.

In operation the stroke of the hand on the handle G rst depresses the platen A into contact with the record-receiving strip, ribbon, and type against the tension of the spring I-I, and when the platen comes in contact with the record-receiving strip, ribbon,

and type the Continued downward movement of the plunger-rod B under the impulse of the stroke on the handle will be opposed to the tension of the spring F, and hence will be of yielding nature, so that no sudden or abrupt jar or stroke on the type can be made possible.

As a matter of experience it is foundV that a violent stroke with all the power that the operator can use without injury to the hand will not injure the type, because of the nal cushioning effect which the stroke is given.

It is obvious that changes might be re'- sorted to in the form and arrangement of the several parts Without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth; but

What I claim isv to the platen, the limited downward stroke of the plunger-rod being materially greater than the distance between the normal position of the impression-platen and the article to be operated upon whereby the impression-platen is applied yieldingly to the article to be operated upon no matter how great the force of the downward stroke of the piston-rod may be, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in pres- =ence of two witnesses, this 19th day of April,

, PETER G.A GIROUD. Witnesses:

FREDK. HAYNES,

C( Sa SUNDGREN. 

